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题目:

Inverted polymer solar cells integrated with small molecular electron collection layer

 

 

作者:

Ai-Li Shi a, Yan-Qing Li a,*, Zai-Quan Xu a, Fu-Zhou Sun a, Jian Li a, Xiao-Bo Shi a, Huai-Xin Wei a, Shuit-Tong Lee a, Satoshi Kera b, Nobuo Ueno b,*, Jian-Xin Tang a,*

 

 

单位:

a Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China

b Graduate School of Advanced Integration Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan

 

 

摘要:

An efficient inverted polymer solar cell (PSC) is reported by integrating a small molecular electron collection layer (ECL) between indium tin oxide (ITO) cathode and the photoactive layer of blended poly(3-hexylthiophene) and [6,6]-phenyl C61 butyric acid methyl ester (P3HT:PCBM). The ECL is composed of a cesium carbonate-doped tris(8-hydroxyquinolinato) aluminum (Cs2CO3:Alq3) layer. As determined by photoelectron spectroscopy and electrical measurements, the Cs2CO3 doping induces suitable energy level alignment at the ITO/Cs2CO3:Alq3/PCBM interface and the increase in bulk conductivity of organic ECL, which are favorable to electron extraction through Cs2CO3:Alq3 to ITO cathode. In addition, optical simulation indicates that the Cs2CO3:Alq3 layer can act as an optical spacer to modulate the region of highest incident light intensity within the photoactive layer, where absorption and charge dissociation are efficient. The inverted PSC with an optimized Cs2CO3:Alq3 ECL exhibits a power conversion efficiency of 4.83%. The method reported here provides a facile approach to achieve high-performance inverted PSCs at low processing temperature.

 

 

影响因子:

4.047

 

 

分区情况:

1

 

 

链接:

http://dx.doi.org/10.1016/j.orgel.2013.04.029


 

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